Stability Balls, also known as balance balls, fitness balls, or exercise balls, have been known for 50 years to provide therapeutic and training benefits. Their their original intended application was as a back-care tool for physical and occupational therapy—users recovering from injury or surgery can improve joint mobility and muscle flexibility when they move on the balls in a static or assistive manner.

SPRI was instrumental in helping elevate stability balls within the club/instructor market. If and when SPRI stability balls are punctured or torn, they will hold their original shape, losing air slowly rather than bursting. This ensures maximum safety while sitting, lying, kneeling, or lifting weights on the ball (up to 300, 400, or 500 pounds, depending on the ball). SPRI works closely with its trusted manufacturing partner to make sure that all SPRI stability balls and balance balls are durable, are free of harmful phthalates, maintain their shape and feel, and provide a safe, slip-resistant texture.